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CHEN-NORTHERN, INC. <br /> CONSULTING ENGINEERS AND SCIENTISTS <br /> REPORT OF FIELD NUCLEAR DENSITY TESTING <br /> TO: Mid-Continent Resources, Inc. JOB NO. 4 531 93 DATE: 8-17-93 <br /> Attn: Ms. Diane Delaney <br /> P.O. Box 1298 <br /> Glenwood Springs, CO 81602 DAILY REPORT NO. 1 SHEET 1 OF 1 <br /> PROJECT: Materials Testing Services, Waste Coal Piles. <br /> SPECIFICATION COMPACTION & MATERIAL <br /> MINIMUM REQUIRED IN-PLACE DENSITY: 90% AS DETERMINED BY: AASHTO T-99-74 <br /> CONSTRUCTION CONTRACTOR: TEST LOCATIONS WERE SELECTED BY: Chen-Northern <br /> TYPE AND NUMBER OF EARTH MOVING UNITS: <br /> TYPE AND NUMBER OF COMPACTION UNITS: Coal Trucks THICKNESS OF LIFT: Not Observed <br /> METHOD OF ADDING MOISTURE: NUMBER OF PASSES: Not Observed <br /> _ LABORATORY FIELD <br /> DEPTH OR MAXIMUM OPTIMUM DRY MOISTURE PERCENT <br /> TEST LOCATION ELEVATION DRY MOISTURE DENSITY CONTENT (RELATIVE/ SOIL TYPE <br /> NO. (FEET) DENSITY CONTENT (PCF) M MAXIMUM) <br /> *BG=Below Grade (pcf) (%) OBTAINED <br /> 1 Test Pit No. 1 4 1/2' BG* 101.5 7.6 106.8 9.2 100+ Low Grade Coal <br /> 2 Test Pit No. 2 4' BG 101.5 7.6 101.4 7.5 100 Low Grade Coal <br /> 3 Test Pit No. 3 4' BG 101.5 7.6 98.7 8.1 97 Low Grade Coal <br /> 4 Test Pit No. 4 4 1/2' BG 101.5 7.6 114.4 6.5 100+ Low Grade Coal <br /> 5 Test Pit No. 5 5' BG 101.5 7.6 106.0 7.5 100+ Low Grade Coal <br /> 6 100' West of <br /> Test Pit No. 5 Grade 101.5 7.6 100.7 6.1 99 Low Grade Coal <br /> 7 150' West of <br /> Test Pit No. 4 Grade 101.5 7.6 90.8 6.3 89 Low Grade Coal <br /> 8 120' Northeast of <br /> Test Pit No. 1 Grade 101.5 7.6 107.9 3.9 100+ Low Grade Coal <br /> FULL TIME OBSERVATION X PART TIME OBSERVATION <br /> THIS REPORT PRESENTS OPINIONS FORMED AS A RESULT OF OUR OBSERVATIONS OF FILL PLACEMENT. WE HAVE RELIED ON THE CONTRACTOR TO <br /> CONTINUE APPLYING THE RECOMMENDED COMPACTIVE EFFORT AND MOISTURE TO FILL DURING THE TIMES WHEN OUR OBSERVER IS NOT OBSERVING <br /> OPERATIONS. TESTS ARE MADE OF THE FILL ONLY AS BELIEVED NECESSARY TO CALIBRATE OUR OBSERVER'S JUDGEMENT. TEST DATA ARE NOT <br /> THE SOLE BASIS FOR OPINIONS ON WHETHER THE FILL MEETS SPECIFICATIONS. <br /> THE NUCLEAR DENSOMETER METHOD OF TESTING WAS USED IN SUBSTANTIAL ACCORDANCE WITH ASTM D2992 AND D3017. <br /> PRELIMINARY OBSERVATIONS AND/OR TEST RESULTS VERBALLY REPORTED TO: Diane Delaney <br /> PROGRESS REPORT: Tests were taken at coal disposal pile (Sutey Pile). <br /> COPIES <br /> Bobby J. Hays Fred R. Cameron <br /> FIELD OBSERVER APPROVED BY <br /> As a mutual protection to clients, the public and ourselves, all reports are submitted as the confidential property of our clients, <br /> and authorization for publication of statement, conclusions or extracts from or regarding our reports is reserved pending our written <br /> approval. Samples will be disposed of after testing is completed unless other arrangements are agreed to in writing. <br /> A member of the HIH group of companies <br />